table.tablesorter thead tr .header {
  background-image: url(../img/bg.gif);
  background-repeat: no-repeat;
  background-position: center right;
  cursor: pointer;
}
table.tablesorter thead tr .headerSortUp {
  background-image: url(../img/asc.gif);
}
table.tablesorter thead tr .headerSortDown {
  background-image: url(../img/desc.gif);
}
table.tablesorter thead tr .headerSortDown, table.tablesorter thead tr .headerSortUp {
  background-color: #D9EDF7;
}
